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Chart Speed: Chart Speed is a user-controllable feature that sets the speed at which
sonar information moves across the display. A faster setting displays sonar
information from more pings and shows more detail, but the information moves
quickly across the display; a slower setting permits viewing of more sonar history, but
does not display as much detail. The best settingis often the user's personal choice.
Cone Angle: The cone angle is the angular measurement of the sonar beam at a
specific dB down point (i.e. -10 dB). See dB Down Point.
Customizable Digital Readouts: Customizable Digital Readouts is a Humminbird®
feature that permits the user to select the specific digital information that appears
in the main Sonar view (i.e. Speed, Temperature, Barometric Pressure, TripLog, etc.)
Dead Zone: The dead zone is the area of the sonar beam that is received after the
main bottom return. Fish and other objects close to the bottom that fall within the
dead zone will probably not be visible in the sonar beam. Precision sonar beams,
such as the Humminbird® 20° beam, have a smaller dead zone than wider sonar
beams.
Decibel: A Decibel is themeasurement for sound pressurelevel, or "intensity" ofthe
sonar return. See dB Down Point.
dB Down Point: The dB Down Point is the standard decibel level at which the sonar
cone angle is measured, and is written as "@ -10 dB" or "@ -3 dB". Measurements at
smaller down points (bigger negative numbers) indicate that the less intensive
sonar signals are being used for the measurement.
Display, FSTN: FSTN is an acronym for Film Super-Twist Nematic. FSTN is a
monochrome display technology characterized by black, high-contrast pixels. All
monochrome fixed mount Humminbird® products use FSTN technology.
DualBeam PLUS™: DualBeam PLUS™ is a Humminbird® sonar configuration that
uses two sonar beams simultaneously, and combines the information from both
beams into one view by overlapping the data on-screen, or shows each beam
individually side by side, orpermits each beam to be viewed individuallyfull screen.
Feature Memory: Feature Memory is a Humminbird® feature that retainsthe user's
menu settings in permanent memory. Settings are retained even when the unit is
powered off indefinitely.
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